JPH09182323A - Non-contact type electric power transmission device - Google Patents
Non-contact type electric power transmission deviceInfo
- Publication number
- JPH09182323A JPH09182323A JP7342615A JP34261595A JPH09182323A JP H09182323 A JPH09182323 A JP H09182323A JP 7342615 A JP7342615 A JP 7342615A JP 34261595 A JP34261595 A JP 34261595A JP H09182323 A JPH09182323 A JP H09182323A
- Authority
- JP
- Japan
- Prior art keywords
- power
- inductor
- capacitor
- rectified
- transmission device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本願発明は、商用電源から得
た電力を２次側回路に非接触で伝達する非接触式電力伝
達装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-contact type power transmission device for non-contactly transmitting electric power obtained from a commercial power source to a secondary side circuit.
【０００２】[0002]
【従来の技術】近年、コードレス電話、液晶テレビ、電
動歯ブラシ、工作器具など、電力を使用する各種の携帯
機器が日常的に多数使用されている。このような携帯機
器は、通常、充電式の電池を内蔵しており、適宜充電す
る必要がある。この充電には、各種の方法が採用されて
いるが、携帯機器に充電用のアダプタやコードなどを接
続することなく、携帯機器を単に充電器台の上などに載
置するだけで充電が行われるようにするのが最も便利で
ある。2. Description of the Related Art In recent years, a large number of various portable devices using electric power, such as cordless telephones, liquid crystal televisions, electric toothbrushes, and machine tools, have been used on a daily basis. Such a portable device usually has a built-in rechargeable battery and needs to be charged appropriately. Although various methods are used for this charging, charging is performed simply by placing the mobile device on the charger base, etc. without connecting a charging adapter or cord to the mobile device. It is most convenient to be taught.
【０００３】そこで、電磁誘導を利用した非接触式電力
伝達装置が提案されているが、従来の非接触式電力伝達
装置は、商用電源からの電力を整流し、その整流電力を
所定周波数でスイッチングしてインダクタを含む共振手
段に供給することにより、共振手段のインダクタに電磁
気的に結合可能なインダクタを含む２次側回路に非接触
で電力を伝達する構成であった。Therefore, although a non-contact power transmission device utilizing electromagnetic induction has been proposed, the conventional non-contact power transmission device rectifies power from a commercial power source and switches the rectified power at a predetermined frequency. Then, the power is transmitted to the resonance means including the inductor in a contactless manner to the secondary side circuit including the inductor that can be electromagnetically coupled to the inductor of the resonance means.
【０００４】しかし、従来の非接触式電力伝達装置で
は、商用電力を全波整流した整流電力を共振回路に直接
供給するので、整流電力の電圧が高く、このため共振回
路に接続されたスイッチング用のトランジスタの損失が
大きいことから、スイッチング周波数を十分に高くする
ことができず、この結果、共振回路のインダクタンスを
小さくすることができない。たとえば、商用電源の電圧
が１００ボルトの場合、全波整流した整流電力の電圧の
ピーク値は１４１ボルト程度であり、スイッチング周波
数は数ＫＨｚ〜百数十ＫＨｚ程度以下となって、インダ
クタンスは数ｍＨ程度（たとえば７．０５ｍＨ）と大き
な値になる。また、スイッチング用のトランジスタに印
加される電圧のピーク値も、たとえば４４２ボルトと大
きな値になる。However, in the conventional non-contact power transmission device, the rectified power obtained by full-wave rectifying the commercial power is directly supplied to the resonant circuit, so that the voltage of the rectified power is high and therefore the switching circuit connected to the resonant circuit is used. Since the transistor has a large loss, the switching frequency cannot be increased sufficiently, and as a result, the inductance of the resonance circuit cannot be reduced. For example, when the voltage of the commercial power supply is 100 V, the peak value of the voltage of the rectified electric power that is full-wave rectified is about 141 V, the switching frequency is about several KHz to several hundred and several tens KHz or less, and the inductance is several mH. It becomes a large value of about (for example, 7.05 mH). The peak value of the voltage applied to the switching transistor also becomes a large value, for example, 442 volts.
【０００５】したがって、共振回路のインダクタが大型
化し、インダクタを基板上にパターン化することができ
ないので、非接触式電力伝達装置の小型・軽量化の妨げ
となるとともに、インダクタを個別部品として基板に実
装する必要があり、生産性が悪いという課題があった。
しかも、スイッチング用のトランジスタとして、高耐圧
のものを用いる必要があった。Therefore, the inductor of the resonance circuit becomes large and the inductor cannot be patterned on the substrate, which hinders the size and weight reduction of the non-contact type power transmission device and also allows the inductor to be formed as an individual component on the substrate. There was a problem that it had to be implemented and productivity was poor.
Moreover, it is necessary to use a high withstand voltage transistor as the switching transistor.
【０００６】[0006]
【発明の開示】本願発明は、上記した事情のもとで考え
出されたものであって、共振手段のインダクタンスを良
好に小さくできる非接触式電力伝達装置を提供すること
をその課題とする。DISCLOSURE OF THE INVENTION The invention of the present application was conceived under the circumstances described above, and an object thereof is to provide a non-contact power transmission device in which the inductance of the resonance means can be favorably reduced.
【０００７】上記の課題を解決するため、本願発明で
は、次の技術的手段を講じている。In order to solve the above problems, the present invention takes the following technical measures.
【０００８】本願発明の第１の側面によれば、商用電源
からの電力を整流し、その整流電力を所定周波数でスイ
ッチングしてインダクタを含む共振手段に供給すること
により、共振手段のインダクタに電磁気的に結合可能な
インダクタを含む２次側回路に非接触で電力を伝達する
非接触式電力伝達装置であって、整流電力の電圧を所定
値に降圧させる降圧手段を設けた非接触式電力伝達装置
が提供される。According to the first aspect of the present invention, by rectifying the power from the commercial power source, switching the rectified power at a predetermined frequency and supplying the rectified power to the resonance means including the inductor, the inductor of the resonance means is electromagnetized. Is a non-contact type power transmission device for non-contactly transmitting electric power to a secondary side circuit including an inductor that can be electrically coupled, the non-contact type power transmission provided with a step-down means for stepping down the voltage of rectified electric power to a predetermined value. A device is provided.
【０００９】降圧手段により整流電力の電圧を所定値に
降圧させて共振手段に供給するので、スイッチングの損
失が軽減され、この結果、スイッチング周波数を十分に
高くできる。しかも、共振手段のインダクタに印加され
る電圧が十分に低い。したがって、共振手段のインダク
タンスを良好に小さくでき、たとえば、インダクタを基
板上にパターン化できる。したがって、装置の小型・軽
量化を実現できるとともに、インダクタを個別部品とし
て基板に実装する必要がなくなり、生産性の向上を図る
ことができる。もちろん、スイッチング周波数を十分に
高くできることから、２次側回路のインダクタンスも小
さくでき、２次側回路についても同様の効果が得られ
る。Since the voltage of the rectified electric power is stepped down to a predetermined value by the step-down means and supplied to the resonance means, switching loss is reduced, and as a result, the switching frequency can be sufficiently increased. Moreover, the voltage applied to the inductor of the resonance means is sufficiently low. Therefore, the inductance of the resonance means can be favorably reduced, for example, the inductor can be patterned on the substrate. Therefore, it is possible to reduce the size and weight of the device, and it is not necessary to mount the inductor as an individual component on the substrate, and productivity can be improved. Of course, since the switching frequency can be made sufficiently high, the inductance of the secondary side circuit can be reduced and the same effect can be obtained for the secondary side circuit.
【００１０】商用電源からの電力を整流する整流手段と
しては、たとえば全波整流回路、あるいは半波整流回路
などを用いることができる。As the rectifying means for rectifying the electric power from the commercial power source, for example, a full-wave rectifying circuit or a half-wave rectifying circuit can be used.
【００１１】インダクタを含む共振手段としては、たと
えばインダクタとキャパシタとの並列共振回路、あるい
はインダクタとキャパシタとの直列共振回路などを用い
ることができる。As the resonance means including the inductor, for example, a parallel resonance circuit of an inductor and a capacitor or a series resonance circuit of an inductor and a capacitor can be used.
【００１２】好ましい実施の形態によれば、整流電力の
スイッチングが、整流電力を電源とする発振器と、この
発振器からの発振出力に応じて共振手段に供給される整
流電力をスイッチングするトランジスタとにより行われ
る。According to a preferred embodiment, switching of the rectified electric power is performed by an oscillator which uses the rectified electric power as a power source and a transistor which switches the rectified electric power supplied to the resonance means according to an oscillation output from the oscillator. Be seen.
【００１３】トランジスタとしては、電界効果トランジ
スタあるいはバイポーラトランジスタなどを用いること
ができる。電界効果トランジスタの場合、ゲートが発振
器の出力端に接続され、ソース・ドレイン間が共振手段
と直列に接続される。バイポーラトランジスタの場合、
ベースが発振器の出力端に接続され、コレクタ・エミッ
タ間が共振手段と直列に接続される。降圧手段により整
流電力を降圧するので、スイッチング用のトランジスタ
として、耐圧の低いものを用いることができ、製造コス
トの低減を図ることができる。As the transistor, a field effect transistor or a bipolar transistor can be used. In the case of a field effect transistor, the gate is connected to the output terminal of the oscillator, and the source and drain are connected in series with the resonance means. For bipolar transistors,
The base is connected to the output terminal of the oscillator, and the collector and the emitter are connected in series with the resonance means. Since the rectified power is stepped down by the step-down means, a transistor having a low breakdown voltage can be used as the switching transistor, and the manufacturing cost can be reduced.
【００１４】別の好ましい実施の形態によれば、２次側
回路は、充電式電池を含み、非接触で伝達された電力に
より充電式電池が充電される。According to another preferred embodiment, the secondary circuit includes a rechargeable battery, and the rechargeable battery is charged by the electric power transmitted in a contactless manner.
【００１５】充電式電池としては、たとえばニッケル・
カドミウム電池、ニッケル・水素電池、リチウムイオン
電池などを用いることができる。As a rechargeable battery, for example, nickel
A cadmium battery, a nickel-hydrogen battery, a lithium ion battery or the like can be used.
【００１６】本願発明のその他の特徴および利点は、添
付図面を参照して以下に行う詳細な説明によって、より
明らかとなろう。Other features and advantages of the present invention will become more apparent from the detailed description given below with reference to the accompanying drawings.
【００１７】[0017]
【発明の実施の形態】以下、本願発明の好ましい実施の
形態を、図面を参照して具体的に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be specifically described below with reference to the drawings.
【００１８】図１は、本願発明に係る非接触式電力伝達
装置の回路図であって、図１においては、非接触式電力
伝達装置１の他に、非接触式電力伝達装置１から無接触
で電力を伝達される２次側回路２も含めて図示してい
る。なお、図示していないが、２次側回路２は、コード
レス電話、液晶テレビ、電動歯ブラシ、工作器具など、
電力を使用する各種の携帯機器に内蔵されており、非接
触式電力伝達装置１は、それらの携帯機器の充電器台に
内蔵されている。この非接触式電力伝達装置１は、ＤＣ
／ＤＣコンバータ３、発振器４、電源プラグ５、ダイオ
ードＤ１、キャパシタＣ１〜Ｃ３、インダクタＬ１、お
よび電界効果トランジスタＦＥＴ１を備えており、電源
プラグ５は商用電源６に電気的に接続される。FIG. 1 is a circuit diagram of a non-contact type power transmission device according to the present invention. In FIG. 1, in addition to the non-contact type power transmission device 1, there is no contact from the non-contact type power transmission device 1. The secondary side circuit 2 to which electric power is transmitted is also shown in the figure. Although not shown, the secondary circuit 2 includes a cordless telephone, a liquid crystal television, an electric toothbrush, a machine tool, etc.
It is built in various mobile devices that use electric power, and the non-contact power transmission device 1 is built in the charger base of those mobile devices. This non-contact power transmission device 1 has a DC
The DC / DC converter 3, the oscillator 4, the power supply plug 5, the diode D1, the capacitors C1 to C3, the inductor L1, and the field effect transistor FET1 are provided, and the power supply plug 5 is electrically connected to the commercial power supply 6.
【００１９】また、２次側回路２は、インダクタＬ２、
キャパシタＣ４，Ｃ５、ダイオードＤ２、スイッチＳＷ
１、および充電式電池７を備えている。The secondary circuit 2 includes an inductor L2,
Capacitors C4, C5, diode D2, switch SW
1 and a rechargeable battery 7.
【００２０】商用電源６の一端は、電源プラグ５を介し
てダイオードＤ１のアノードに接続されており、ダイオ
ードＤ１のカソードは、ＤＣ／ＤＣコンバータ３の入力
端とキャパシタＣ１の一端とに接続されている。ＤＣ／
ＤＣコンバータ３の出力端は、キャパシタＣ２，Ｃ３の
一端と発振器４の電源入力端とインダクタＬ１の一端と
に接続されており、発振器４の出力端は、電界効果トラ
ンジスタＦＥＴ１のゲートに接続されている。インダク
タＬ１の他端は、キャパシタＣ３の他端と電界効果トラ
ンジスタＦＥＴ１のドレインとに接続されており、キャ
パシタＣ１，Ｃ２の他端とＤＣ／ＤＣコンバータ３およ
び発振器４の接地端と電界効果トランジスタＦＥＴ１の
ソースとは、電源プラグ５を介して商用電源６の他端に
接続されている。One end of the commercial power supply 6 is connected to the anode of the diode D1 via the power plug 5, and the cathode of the diode D1 is connected to the input end of the DC / DC converter 3 and one end of the capacitor C1. There is. DC /
The output end of the DC converter 3 is connected to one ends of the capacitors C2 and C3, the power supply input end of the oscillator 4 and one end of the inductor L1, and the output end of the oscillator 4 is connected to the gate of the field effect transistor FET1. There is. The other end of the inductor L1 is connected to the other end of the capacitor C3 and the drain of the field effect transistor FET1, and the other ends of the capacitors C1 and C2, the ground end of the DC / DC converter 3 and the oscillator 4, and the field effect transistor FET1. Is connected to the other end of the commercial power supply 6 via the power plug 5.
【００２１】インダクタＬ２の一端は、キャパシタＣ４
の一端およびダイオードＤ２のアノードに接続されてお
り、ダイオードＤ２のカソードは、キャパシタＣ５の一
端とスイッチＳＷ１の一端とに接続されている。スイッ
チＳＷ１の他端は、充電式電池７の正極端に接続されて
おり、充電式電池７の負極端とキャパシタＣ４，Ｃ５の
他端とは、インダクタＬ２の他端に接続されている。One end of the inductor L2 is connected to the capacitor C4.
To the anode of the diode D2, and the cathode of the diode D2 is connected to one end of the capacitor C5 and one end of the switch SW1. The other end of the switch SW1 is connected to the positive end of the rechargeable battery 7, and the negative end of the rechargeable battery 7 and the other ends of the capacitors C4 and C5 are connected to the other end of the inductor L2.
【００２２】ダイオードＤ１と電解コンデンサからなる
キャパシタＣ１とは、たとえば単相交流１００ボルトの
商用電源６からの電力を整流する整流手段を構成してい
る。ＤＣ／ＤＣコンバータ３は、ダイオードＤ１および
キャパシタＣ１からなる整流手段により整流された整流
電力の電圧を所定電圧に降圧する降圧手段を構成してい
る。このＤＣ／ＤＣコンバータ３の具体的な回路は周知
であるので、図示および説明を省略する。キャパシタＣ
２は、電解コンデンサからなり、ＤＣ／ＤＣコンバータ
３により降圧された整流電力を平滑化する平滑手段を構
成している。発振器４と電界効果トランジスタＦＥＴ１
とは、キャパシタＣ２により平滑化された整流電力を所
定周波数でスイッチングするスイッチング手段を構成し
ている。すなわち、発振器４は、ＤＣ／ＤＣコンバータ
３により降圧された整流電力を電源として動作し、予め
設定された所定周波数のパルス信号を電界効果トランジ
スタＦＥＴ１のゲートに供給する。これにより電界効果
トランジスタＦＥＴ１のチャネルすなわちドレイン・ソ
ース間が、発振器４からのパルス信号の周波数に応じて
導通状態と非導通状態との間の反転を繰り返し、インダ
クタＬ１とキャパシタＣ３とからなる共振手段に供給さ
れるＤＣ／ＤＣコンバータ３からの整流電力を断続させ
る。なお、発振器４の具体的な回路は周知であるので、
図示および説明を省略する。また、電界効果トランジス
タＦＥＴ１は、ｎチャネルエンハンスメントモードＭＯ
Ｓ・ＦＥＴである。インダクタＬ１とキャパシタＣ３と
は、並列共振回路からなる共振手段を構成しており、こ
の並列共振回路の共振条件をほぼ満足するように、発振
器４の発振周波数が設定されている。The diode D1 and the capacitor C1 composed of an electrolytic capacitor constitute a rectifying means for rectifying the electric power from the commercial power source 6 of single-phase AC 100 V, for example. The DC / DC converter 3 constitutes a step-down means for stepping down the voltage of the rectified power rectified by the rectifying means composed of the diode D1 and the capacitor C1 to a predetermined voltage. Since the specific circuit of the DC / DC converter 3 is well known, illustration and description thereof will be omitted. Capacitor C
Reference numeral 2 is an electrolytic capacitor, and constitutes a smoothing means for smoothing the rectified power stepped down by the DC / DC converter 3. Oscillator 4 and field effect transistor FET1
Represents a switching means for switching the rectified power smoothed by the capacitor C2 at a predetermined frequency. That is, the oscillator 4 operates by using the rectified power stepped down by the DC / DC converter 3 as a power source and supplies a pulse signal of a predetermined frequency set in advance to the gate of the field effect transistor FET1. As a result, the channel of the field effect transistor FET1, that is, between the drain and the source, repeats inversion between the conducting state and the non-conducting state according to the frequency of the pulse signal from the oscillator 4, and the resonance means including the inductor L1 and the capacitor C3. The rectified electric power supplied from the DC / DC converter 3 is intermittently supplied. Since the concrete circuit of the oscillator 4 is well known,
Illustration and description are omitted. Further, the field effect transistor FET1 has an n-channel enhancement mode MO.
S-FET. The inductor L1 and the capacitor C3 constitute a resonance means composed of a parallel resonance circuit, and the oscillation frequency of the oscillator 4 is set so as to substantially satisfy the resonance condition of the parallel resonance circuit.
【００２３】２次側回路２のインダクタＬ２とキャパシ
タＣ４とは、並列共振回路を構成しており、インダクタ
Ｌ２を非接触式電力伝達装置１のインダクタＬ１による
磁束と鎖交する状態に位置させることにより、インダク
タＬ２に電磁誘導による起電力が発生する。この並列共
振回路は、電磁誘導によりインダクタＬ２に発生する起
電力により共振するように回路条件が設定されている。
ダイオードＤ２と電解コンデンサからなるキャパシタＣ
５とは、インダクタＬ２とキャパシタＣ４とからなる並
列共振回路からの誘導電力を整流する整流回路を構成し
ている。スイッチＳＷ１は、ダイオードＤ２とキャパシ
タＣ５とからなる整流回路からの整流電力を充電式電池
７に供給するスイッチ手段を構成している。充電式電池
７は、スイッチＳＷ１からなるスイッチ手段を介して供
給される整流電力により充電され、携帯機器の制御回路
および駆動回路などの各種回路（図示せず）に直流電力
を供給する電源を構成している。The inductor L2 and the capacitor C4 of the secondary side circuit 2 constitute a parallel resonance circuit, and the inductor L2 is positioned so as to interlink with the magnetic flux generated by the inductor L1 of the non-contact power transmission device 1. As a result, electromotive force due to electromagnetic induction is generated in the inductor L2. The circuit condition of this parallel resonance circuit is set so that the parallel resonance circuit resonates with the electromotive force generated in the inductor L2 by electromagnetic induction.
Capacitor C consisting of diode D2 and electrolytic capacitor
5 constitutes a rectifying circuit for rectifying the induced power from the parallel resonant circuit including the inductor L2 and the capacitor C4. The switch SW1 constitutes switch means for supplying the rechargeable battery 7 with the rectified power from the rectifier circuit including the diode D2 and the capacitor C5. The rechargeable battery 7 is charged by the rectified power supplied via the switch means including the switch SW1 and constitutes a power supply for supplying DC power to various circuits (not shown) such as a control circuit and a drive circuit of the mobile device. doing.
【００２４】次に動作を説明する。電源プラグ５を商用
電源６のコンセント（図示せず）に挿入すると、商用電
源６から非接触式電力伝達装置１にたとえば単相交流１
００ボルトの商用電力が供給され、この商用電力は、ダ
イオードＤ１とキャパシタＣ１とからなる整流手段によ
り整流され、ＤＣ／ＤＣコンバータ３により所定電圧に
降圧されて、キャパシタＣ２からなる平滑手段により平
滑化され、インダクタＬ１とキャパシタＣ３とからなる
共振手段および発振器４に供給される。これにより発振
器４が、所定周波数のパルス信号を電界効果トランジス
タＦＥＴ１のゲートに供給し、電界効果トランジスタＦ
ＥＴ１が所定周波数でオン・オフする。したがって、イ
ンダクタＬ１とキャパシタＣ３とからなる共振手段に供
給される整流電力が所定周波数で断続され、共振手段が
共振して、インダクタＬ１により磁束が発生する。この
とき、ＤＣ／ＤＣコンバータ３により整流電力を適切に
降圧しているので、スイッチングによる電界効果トラン
ジスタＦＥＴ１の損失が良好に軽減されることから、ス
イッチング周波数を十分に高くできる。この結果、イン
ダクタＬ１のインダクタンスを十分に小さくでき、イン
ダクタＬ１を基板上にパターン化することが可能にな
る。Next, the operation will be described. When the power plug 5 is inserted into an outlet (not shown) of the commercial power supply 6, the commercial power supply 6 is connected to the non-contact power transmission device 1, for example, a single-phase alternating current 1
A commercial power of 00 V is supplied, and the commercial power is rectified by a rectifying unit including a diode D1 and a capacitor C1, reduced to a predetermined voltage by the DC / DC converter 3, and smoothed by a smoothing unit including a capacitor C2. And is supplied to the oscillator 4 and the resonance means including the inductor L1 and the capacitor C3. As a result, the oscillator 4 supplies a pulse signal of a predetermined frequency to the gate of the field effect transistor FET1, and the field effect transistor F
ET1 turns on and off at a predetermined frequency. Therefore, the rectified electric power supplied to the resonance means composed of the inductor L1 and the capacitor C3 is interrupted at a predetermined frequency, the resonance means resonates, and a magnetic flux is generated by the inductor L1. At this time, since the rectified power is appropriately stepped down by the DC / DC converter 3, the loss of the field effect transistor FET1 due to switching is appropriately reduced, and thus the switching frequency can be sufficiently increased. As a result, the inductance of the inductor L1 can be made sufficiently small, and the inductor L1 can be patterned on the substrate.
【００２５】たとえば、商用電源６の電圧を１００ボル
トとし、ＤＣ／ＤＣコンバータ３により整流電力の電圧
のピーク値を数ボルト〜数十ボルト（たとえば１２ボル
ト）に降圧した場合、電界効果トランジスタＦＥＴ１の
スイッチングによる損失が許容限度になるまでスイッチ
ングの周波数を高くすると、数百ＫＨｚ〜数ＭＨｚの周
波数でスイッチングすることが可能になる。したがっ
て、インダクタＬ１のインダクタンスをたとえば６０μ
Ｈ程度に小さくできる。この結果、インダクタＬ１を基
板上でパターン化できることから、装置の小型・軽量化
を実現できるとともに、インダクタＬ１を個別部品とし
て基板に実装する必要がなくなり、生産性の向上を実現
できる。しかも、電界効果トランジスタＦＥＴ１のドレ
インに印加される電圧のピーク値もたとえば３７．７ボ
ルト程度に小さくなり、電界効果トランジスタＦＥＴ１
として耐圧の低いものを用いることができる。For example, when the voltage of the commercial power source 6 is set to 100 V and the peak value of the voltage of the rectified power is reduced to several volts to several tens of volts (for example, 12 volts) by the DC / DC converter 3, the field effect transistor FET1 is operated. If the switching frequency is increased until the switching loss reaches an allowable limit, switching can be performed at a frequency of several hundreds KHz to several MHz. Therefore, the inductance of the inductor L1 is, for example, 60 μm.
It can be as small as H. As a result, since the inductor L1 can be patterned on the substrate, the size and weight of the device can be reduced, and it is not necessary to mount the inductor L1 as an individual component on the substrate, and productivity can be improved. Moreover, the peak value of the voltage applied to the drain of the field effect transistor FET1 also becomes small, for example, about 37.7 volts.
A material having a low breakdown voltage can be used.
【００２６】非接触式電力伝達装置１を内蔵した充電器
台の上に２次側回路２を内蔵した携帯機器を載置する
と、非接触式電力伝達装置１のインダクタＬ１により発
生した磁束が、２次側回路２のインダクタＬに鎖交する
ように、インダクタＬ１，Ｌ２が配置されているので、
インダクタＬ１により発生した磁束により、インダクタ
Ｌ２に起電力が発生し、これによりインダクタＬ２とキ
ャパシタＣ４とからなる並列共振回路が共振し、誘導電
力がダイオードＤ２とキャパシタＣ５とからなる整流回
路により整流されて、スイッチＳＷ１が閉成していれ
ば、充電式電池７に供給され、充電式電池７が充電され
る。When a portable device having the secondary circuit 2 built therein is placed on the charger base having the non-contact power transmission device 1 built therein, the magnetic flux generated by the inductor L1 of the non-contact power transmission device 1 becomes Since the inductors L1 and L2 are arranged so as to interlink with the inductor L of the secondary circuit 2,
The magnetic flux generated by the inductor L1 generates an electromotive force in the inductor L2, which causes the parallel resonant circuit including the inductor L2 and the capacitor C4 to resonate, and the induced power is rectified by the rectifying circuit including the diode D2 and the capacitor C5. If the switch SW1 is closed, the rechargeable battery 7 is supplied and the rechargeable battery 7 is charged.
【００２７】すなわち、商用電源６からの電力が、イン
ダクタＬ１とインダクタＬ２との電磁的結合により、非
接触式電力伝達装置１から２次側回路２に非接触で伝達
され、充電式電池７が充電される。なお、インダクタＬ
１に印加される整流電力のスイッチング周波数を高くし
ているので、インダクタＬ１により発生する磁束の周波
数も高いことから、２次側回路２のインダクタＬ２のイ
ンダクタンスも小さくできる。したがって、インダクタ
Ｌ２も基板上にパターン化できるので、２次側回路２の
小型・軽量化を実現できるとともに、インダクタＬ２を
個別部品として基板に実装する必要がなくなり、生産性
の向上を実現できる。以上の結果、携帯機器やその充電
器台を小型・軽量化することも可能になる。That is, the electric power from the commercial power source 6 is transferred from the non-contact type power transfer device 1 to the secondary side circuit 2 in a non-contact manner by the electromagnetic coupling between the inductor L1 and the inductor L2, and the rechargeable battery 7 is formed. Be charged. In addition, inductor L
Since the switching frequency of the rectified power applied to No. 1 is high, the frequency of the magnetic flux generated by the inductor L1 is also high, so that the inductance of the inductor L2 of the secondary side circuit 2 can be reduced. Therefore, since the inductor L2 can also be patterned on the substrate, the secondary circuit 2 can be reduced in size and weight, and it is not necessary to mount the inductor L2 as an individual component on the substrate, and productivity can be improved. As a result, it becomes possible to reduce the size and weight of the portable device and its charger stand.
【図１】本願発明に係る非接触式電力伝達装置の回路図
である。FIG. 1 is a circuit diagram of a non-contact power transmission device according to the present invention.
１ 非接触式電力伝達装置 ２ ２次側回路 ３ ＤＣ／ＤＣコンバータ ４ 発振器 ７ 充電式電池 ＦＥＴ１ 電界効果トランジスタ Ｌ１，Ｌ２ インダクタ Ｃ３，Ｃ４ キャパシタ 1 Non-contact Power Transfer Device 2 Secondary Side Circuit 3 DC / DC Converter 4 Oscillator 7 Rechargeable Battery FET1 Field Effect Transistor L1, L2 Inductor C3, C4 Capacitor
Claims (3)
電力を所定周波数でスイッチングしてインダクタを含む
共振手段に供給することにより、前記インダクタに電磁
気的に結合可能なインダクタを含む２次側回路に非接触
で電力を伝達する非接触式電力伝達装置であって、 前記整流電力の電圧を所定値に降圧させる降圧手段を設
けたことを特徴とする、非接触式電力伝達装置。1. A secondary side including an inductor that can be electromagnetically coupled to the inductor by rectifying power from a commercial power source, switching the rectified power at a predetermined frequency and supplying the rectified power to a resonance means including the inductor. A non-contact power transmission device for transmitting electric power to a circuit in a non-contact manner, comprising a step-down means for stepping down the voltage of the rectified power to a predetermined value.
流電力を電源とする発振器と、この発振器からの発振出
力に応じて前記共振手段に供給される前記整流電力をス
イッチングするトランジスタとにより行われることを特
徴とする、請求項１に記載の非接触式電力伝達装置。2. The switching of the rectified power is performed by an oscillator that uses the rectified power as a power source and a transistor that switches the rectified power that is supplied to the resonance unit according to an oscillation output from the oscillator. The non-contact power transmission device according to claim 1, wherein
非接触で伝達された電力により前記充電式電池が充電さ
れることを特徴とする、請求項１または請求項２に記載
の非接触式電力伝達装置。3. The secondary circuit includes a rechargeable battery,
The contactless power transfer device according to claim 1 or 2, wherein the rechargeable battery is charged by power transferred in a contactless manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7342615A JPH09182323A (en) | 1995-12-28 | 1995-12-28 | Non-contact type electric power transmission device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7342615A JPH09182323A (en) | 1995-12-28 | 1995-12-28 | Non-contact type electric power transmission device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09182323A true JPH09182323A (en) | 1997-07-11 |
Family
ID=18355151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7342615A Pending JPH09182323A (en) | 1995-12-28 | 1995-12-28 | Non-contact type electric power transmission device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09182323A (en) |
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